Trolley-head and trolley.



G. H. MERWIN.

TROLLBY HEAD AND TROLLEY.

APPLICATION FILED NOV. 27, 1908.

921,265, Patented May 11, 1909.

2 SHBETS-SHEBT 2.

a l wade 951,3 GHQ-M1277 oughly durable and praeticaland UNITED s'rArEs PATENT OFFICE.

GEORGE H.- MERWINQOFMILFORD, CONNECTICUT.

' TROLLEY-HEAD AND TROLLEY.

"Specification-of Letters Patent.

Patented May 11, 1909.

Application filed November 27, 190l3. Serial No. 464,586.

To all whom it may concern: 1

Be it knownithat I, GEORGE I-l. MERWIN,

acitiz en of the United States, residin at ll/lilfordfcoun'ty of'New Haven, State of Connecticut, have inventeda new and useful plates which may be replaced when worn at slight expense, the head and trolley being thus caused to wearfor'an almost unlimited len 'th of time. i v

fi ith. these and other objects in view I have devised the novel structure of which the following description in connection with the accompanying drawings is a specification, reference characters being used to indicate thc several parts.

Figure 1 is a sideelevation of my novel head and trolley as in use; Fig. 2 a plan view of the head with. the operative parts of the head and trolley in horizontal section; Fig. 3 a sectional view on the line 3-3 in F ig. ,2; Fig. 4 an elevation of the trolley with onev of the contactlplates removed, the shaft. being in section;

(g. 5 an elevation of a contact plate remove ;Fig. 6 an elevation of a side plate removed; and Fig. 7 is an elevation of the body of one of the boxes removed.

10 denotes my novel trolley head as a whole, 11 the pole and 12 'the trolley. The

trolley is carried b r cured to the flange of the-trolley head comprises arms 13 between which the trolley is pivoted. Each arm is provided with an oil reservoir 14 having a filling opening 15 which is closed by a screw cap 16. The a shaft 17 which rotates in boxes 18 secure in the head. The trolley comprises a web 19, a peripheral flange 20 having" a groove 2], bearing lates 22 and side plates 23. The bearingp ates are made in two semi-circular parts, as shown in Figs. 4 and 5, which to ether form the complete bearing of the trol ey. The plates are substantially V shape in' cross-section and are aha ed externally to fit closely in the groove bf t e trolley and internally to receive the' gurrent wire (not shown). They are seby screws or 32.. TlTfbcdies are cylindrical in form externally screw threaded to engage corenter freely rivets 24. It is of course well understood that most of the wear theflan es and that when the flanges of ordinary trdlleys are seriously worn, new trolleys must be substituted in their places. With my novel trolley it is simply necessaryto remove ,the bearing plates and. replace them with new ones, an operation which may be performed quickly and attrifling expense, thus avoiding the expense of new trolleys when the flanges become worn. The shaft is lprovided at its mid-length with a reduced angular ortion 25. The web of the trolley is provi ed with a central hole 26 which receives the full diameter of the shaft. The side plates are each provided with a radial slot 27 extending from the peri hery slightly past the center-and made angu ar at its inner end, which just receives the angular portion of the shaft. The side plates are secured to the Web with slots out of alinement by screws or rivets 28. These side plates lock the trolley to the shaft, as will be more fully explains The boxes in which the shaft rotates each comprise a llaly29 having an external head 30, internal arid external nuts 31 and a cap respondingly-threaded openings'33 in the opposite Walls of the arms of the head, through which the body passes. The inner end of each body is en having an o en'ing38 or the shaft. Between the end of the cap and one side of the arm and between the head and the opposite side of the arm are nuts 31 which serve as lock nuts. etween the ends of the body and the bases of the caps I place packing indicated by 34 which prevents escape of oil. The opposite 'endsof the shaft are received in central longitudinal openings in the bodies which are indicated by 35. Each body is provided with a radial opening 36 lying within the oil reservoir and extending to the central opening, which permits oil to from the reservoir and pass to the shaft. In practice, the o enin s in the bodies become filled with 011 in which the shaft runs, the packing preventing the escape of oil. One of the bodies, the lower one as shown in Fig. 2, has its central open ing extending entirely through it the outer end of theopening being closed by a screw pin 37 "file mode of assemblingis as follows;

upon trolleys is upon aged by acap 32 The arts of the upper box, as seen in Fig. 2, are fi rst placed in the arm but the body, cap and nut arenot screwed tightly to place. The

-body of the lower box with the outer nut .31 thereon is then turned through the lower arm of the body, and then the trolley Without the side plates is placed between the boxes. The inner nut is then turned on and then the cap with the packing therein 1s then turned on the inner end .of the body. The shaft is then inserted through the central opening in the lower body and the'opening closed by means ofthe screw cap; then the side plates of the trolley are slipped to place in engagement with the shaft, as shown in Figs. 2 and 5; then the side plates are secured to the trolley by screws or rivets 28, after which the outer nuts are turned tightly against the outer sides of the arms; then the bodies are turned inward tightly to place; then the inner nuts are o enings from the outer side, caps engagin t e inner ends of the bodies, a shaft journale in the boxes and a trolley carried by the shaft.

2. The combination with the arms of a trolley head having threaded openings, of

boxes comprising bodies turned into said 0 enings and having heads, caps engaging t e other ends of the bodies, lock nuts between the heads and caps and the opposite sides of they arms, 'a shaft journaled lnthe' boxes. and a trolley carried by the shaft.

3. The combination with a trolley head having oil reservoirs and boxes communicatin .with the oil reservoirs, of ashaft journaTed in the boxes and having an angular portion and a trolley comprising a web having an opening which receives the full diameter of the shaft and side plates secured to the web and having slots which receive the angular portion of a shaft and lock the trolley thereto.

4. The combination: with a trolley head having boxes, of a shaft journaled ,in the boxes and having a reduced angular central portion, of a trolley having a webfwith an opening through which-the shaftma y pass and side pl'ates'secured to the web and having radial slots I'nade angular at their inner ends to closely engage the angular portion of the shaft.

5. A trolley comprising a grooved flange, a web having a central openin "'and side plates secured to the flange an provided with radial slots, substantiallyas described, for the purpose specifiedl In testimony whereof I aflix my signature, in presence of twowitnessesl I f GEORGE H. 'MERWIN.

Witnesses: 7 i

A; M. Woosrnn, S. W. ATnERToN. 

